How to Prove Another Driver’s Liability After a Red Light Collision in MA

The information on this site is for general informational purposes only, may be outdated, and is not legal advice; do not rely on it without consulting your own attorney. See full disclaimer.

Detailed Answer

In Massachusetts, you must satisfy four elements of negligence to hold a driver liable for running a red light and causing a collision: duty, breach, causation, and damages.

1. Duty of Care

Every driver must obey traffic laws and operate their vehicle safely. Under M.G.L. c. 89, § 9, drivers must comply with traffic-control signals. Failure to stop at a steady red light violates the law.
M.G.L. c. 89, § 9

2. Breach of Duty

Running a red light breaches the duty of care. You can prove this breach through evidence such as:

  • A police report documenting the signal status.
  • Photographs or video showing the vehicle entering the intersection on red.

3. Causation

You must link the breach directly to your injuries using the “but-for” test: but for the other driver’s red-light violation, the collision would not have occurred.

4. Damages

Document your injuries and property damage with medical records, repair estimates, and billing statements.

Supporting Evidence

  • Traffic signal timing logs from the municipality.
  • Surveillance or dashboard camera footage.
  • Eyewitness statements with contact details.
  • Accident reconstruction expert reports.

Comparative Negligence

Massachusetts applies a modified comparative negligence rule. If you share fault, your award reduces by your percentage of fault, provided you are no more than 50% at fault.
M.G.L. c. 231, § 85

Disclaimer: This article is for educational purposes only and does not constitute legal advice. Consult a qualified attorney to discuss your specific situation.

Helpful Hints

  • File a police report immediately after the crash.
  • Photograph the scene, vehicle positions, and traffic signals.
  • Obtain witness names and statements while memories are fresh.
  • Request traffic signal timing data from the city or state.
  • Preserve any video or electronic data related to the collision.
  • Consult an attorney experienced in Massachusetts motor vehicle claims.

The information on this site is for general informational purposes only, may be outdated, and is not legal advice; do not rely on it without consulting your own attorney. See full disclaimer.